Initial commit

1 files changed, 52 insertions, 0 deletions

diff --git a/VPNAuth.Server/Pages/Auth.cshtml.cs b/VPNAuth.Server/Pages/Auth.cshtml.cs
new file mode 100644
index 0000000..bdcbc59
--- /dev/null
+++ b/VPNAuth.Server/Pages/Auth.cshtml.cs
@@ -0,0 +1,52 @@
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using Microsoft.EntityFrameworkCore.ChangeTracking;
+using VPNAuth.Server.Database;
+
+namespace VPNAuth.Server.Pages;
+
+public class Auth : PageModel
+{
+    public Config Config;
+    public ConfigUser? User;
+    public bool ValidRequest;
+    public EntityEntry<AuthRequest>? RequestEntry;
+    
+    public readonly List<string> RequiredQueryParams =
+    [
+        "response_type",
+        "client_id",
+        "scope",
+        "code_challenge_method",
+        "code_challenge"
+    ];
+    
+    public void OnGet()
+    {
+        Config = Config.Read();
+        User = HttpContext.GetUser();
+
+        ValidRequest = RequiredQueryParams.All(key => Request.Query.ContainsKey(key))
+                            && Config.FindApp(Request.Query["client_id"]!) != null
+                            && Request.Query["code_challenge_method"] == "S256"
+                            && User != null;
+
+        RequestEntry = null;
+
+        if (ValidRequest)
+        {
+            using var db = new Database.Database();
+            RequestEntry = db.Add(new AuthRequest
+            {
+                InitTime = DateTime.Now,
+                ClientId = Request.Query["client_id"]!,
+                Code = PkceUtils.GenerateCode(),
+                State = Request.Query["state"],
+                Scopes = Request.Query["scope"].ToString().Split(" ").ToList(),
+                CodeChallenge = Request.Query["code_challenge"]!,
+                CodeChallengeMethod = Request.Query["code_challenge_method"]!,
+                Accepted = false
+            });
+            db.SaveChanges();
+        }
+    }
+}